class test3
{
    public static void main ( String [ ] arg )
    {
        int number1;
        int number2;
        number1 = 100;
        number2 = 20;
        System.out.println(number1 + number2);
        System.out.println(number1 - number2);
        System.out.println(number2 - number1);
        System.out.println(number1 * number2);
    }
}